Heat sink assembly

ABSTRACT

A heat sink assembly includes a heat sink, a bracket, and an airflow guide member. The heat sink defines an air outlet at a rear end of the heat sink. The bracket includes two side plates respectively fastened to rear ends of opposite sides of the heat sink. A number of vertically arrayed protrusions are formed on a rear end of an inner surface of one of the side plates. The airflow guide member is pivotably connected between the side plates. An end of the airflow guide member engages with a different one of the protrusions, to position the airflow guide member at a different angle relative to the heat sink.

BACKGROUND

1. Technical Field

The present disclosure relates to a heat sink assembly.

2. Description of Related Art

Many heat sinks include an air inlet and an air outlet opposite to the air inlet. However, generally, air blown out of the air outlet are not be utilized efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is an exploded, isometric view of an exemplary embodiment of a heat sink assembly, wherein the heat sink assembly includes an airflow guide member.

FIG. 2 is an assembled, isometric view of the heat sink assembly of FIG. 1.

FIG. 3 is an assembled, isometric view of the heat sink assembly of FIG. 1 together with another airflow guide member.

DETAILED DESCRIPTION

The disclosure, including the accompanying drawings, is illustrated by way of example and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.

FIGS. 1 and 2 show an exemplary embodiment of a heat sink assembly. The heat sink assembly includes a heat sink 10, a bracket 20, and an airflow guide member 30.

The heat sink 10 includes a base 12 and a plurality of fins 14 formed on the base 12 in a substantially perpendicular manner. The fins 14 are parallel to each other, and extend in a fore-and-aft direction. An air inlet 16 is defined in the front ends of the fins 14, to allow airflow to be blown into spaces between the fins 14. An air outlet 18 is defined in the rear ends of the fins 14, to allow the airflow to be blown out of the heat sink 10. The fins 14 at the left and right sides of the heat sink 10 each define two vertically arrayed through holes 141, adjacent to the rear end of the heat sink 10.

The bracket 20 includes two opposite side plates 21, a top plate 23 connected between the tops of the side plates 21, and a connecting plate 25 connected between the rear ends of the bottoms of the side plates 21. Two vertically arrayed poles 212 extend from the front end of the inner surface of each side plate 21. A plurality of vertically arrayed pivot holes 214 is defined in the rear end of each side plate 21, and a plurality of vertically arrayed protrusions 215 is formed on the inner surface of each side plate 21 between every two adjacent pivot holes 214. The protrusions 215 are arranged slightly behind the pivot holes 214.

The airflow guide member 30 includes an airflow guide plate 31 and two arms 33 extending forward from opposite ends of the airflow guide plate 31. A pivot 332 protrudes outward from an upper portion of the outer surface of each arm 33.

In assembly, the front ends of the side plates 21 are deformed away from each other, to allow the rear ends of the fins 14 to be received in a space bound by the top plate 23 and the side plates 21. When the poles 212 correspondingly align with the through holes 141, the side plates 21 are restored, to allow the poles 212 to correspondingly engage in the through holes 141. Thereby, the bracket 20 is mounted to the rear end of the heat sink 10. The connecting plate 25 is arranged behind the base 12.

The arms 33 are deformed towards each other, and received between the rear ends of the side plates 21. The pivots 332 are aligned with two pivot holes 214 of the side plates 21 in a same level. The arms 33 are restored, to allow the pivots 332 to engage in the corresponding pivot holes 214. Thereby, the airflow guide member 30 is pivotably connected to the rear ends of the side plates 21. Because there is a plurality of vertically arrayed protrusions 215 formed on the rear end of the inner surface of each side plate 21, when the bottom of the airflow guide member 30 is rotated rearwards, the arms 33 can be engaged with different protrusions 215, to position the airflow guide member 30 to different angles relative to the base 12.

In use, the airflow guide member 30 is rotated to a predetermined angle, to allow the arms 33 to engage with two corresponding protrusions 215 of the side plates 21. Airflow is blown into spaces between the fins 14 through the air inlet 16, and blown out of the heat sink 10 through the air outlet 18. The airflow guide member 30 at the air outlet 18 can guide the airflow to a predetermined place which needs more heat dissipation. Therefore, the airflow out of the heat sink 10 is efficiently used.

In the embodiment, opposite ends of the airflow guide member 30 are pivotably connected to two pivot holes 214 at the upper sections of the side plates 21. In other embodiments, according to heat dissipation requirements, the opposite ends of the airflow guide member 30 can be pivotably connected to another two corresponding pivot holes 214 at different heights.

Referring to FIG. 3, in other embodiments, according to heat dissipation requirements, a plurality of airflow guide members 30 can be mounted to the bracket 20 at different heights.

Even though numerous characteristics and advantages of the embodiments have been set forth in the foregoing description, together with details of the structure and the functions of the embodiments, the disclosure is illustrative only, and changes may be made in details, especially in the matters of shape, size, and arrangement of parts within the principles of the embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. A heat sink assembly, comprising: a heat sink defining an air outlet at a rear end of the heat sink; a bracket comprising two side plates respectively mounted to rear ends of opposite sides of the heat sink, wherein a plurality of vertically arrayed protrusions is formed on a rear end of an inner surface of one of the side plates; and an airflow guide member pivotably connected between the side plates, an end of the airflow guide member engaging with a different one of the protrusions to position the airflow guide member at a different angle relative to the heat sink.
 2. The heat sink assembly of claim 1, wherein a pivot hole is defined in each side plate above the protrusions, the airflow guide member comprises two pivots at upper portions of opposite ends of the airflow guide member, to pivotably engage in the pivot holes, respectively.
 3. The heat sink assembly of claim 2, wherein the protrusions are arranged behind the pivot holes.
 4. The heat sink assembly of claim 1, wherein at least two vertically arrayed pivot holes are defined in each side plate, the airflow guide member comprises two pivots at the upper portions of opposite ends of the airflow guide member, to selectively and pivotably engage in two pivot holes of the side plates at a same lever, respectively.
 5. The heat sink assembly of claim 4, wherein the protrusions are arranged behind the pivot holes.
 6. The heat sink assembly of claim 1, wherein the heat sink comprises a base and a plurality of fins formed on the base in a substantially perpendicular manner, the fins are parallel to each other, and extend in a fore-and-aft direction, the air outlet is defined in rear ends of the fins, and an air inlet is defined in front ends of the fins.
 7. The heat sink assembly of claim 6, wherein the fins at left and right sides of the heat sink each define two through holes, adjacent to the rear end of the heat sink, two poles are formed on an front end of the inner surface of each side plate, the poles of the side plates respectively engage in the through holes of the fins at left and right sides of the heat sink.
 8. The heat sink assembly of claim 6, wherein the bracket further comprises a top plate connected between tops of the side plates, the top plate is arranged above tops of the rear ends of the fins.
 9. The heat sink assembly of claim 8, wherein the bracket further comprises a connecting plate connected between rear ends of bottoms of the side plates, the connecting plate is arranged behind the base. 